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Absolute voltage of LM5110

Other Parts Discussed in Thread: LM5110

I have questions about LM5110.

1.Please tell me the absolute voltage of IN_A pin and IN_B pin.

2.If the voltage of IN_B is over absolute voltage, what happens from VCC to VEE?  Is the IC broken?

Best regards,

Takahiro Nishizawa

  • Hi Nishizawa-san,

    Sorry for the delay! I thought I replied yesterday, but I think I forgot to press the Reply button...

    It's a little confusing how the device is rated, but I believe the data you are looking for is listed in the ABS MAX and Recommended Operating Conditions tables.

    From the ABS MAX table, it shows IN_A and IN_B (just called IN for simplicity) can be a maximum of 15 volts above IN_REF. IN_REF, in turn, can be a maximum voltage of 5V above VEE. So, IN_A and IN_B can be 20V above VEE.

    If you allow IN_B to exceed the ABS MAX voltage, then note (1) applies (see above). It is difficult to say, but I would assume IN_B itself would be damaged in this case. VCC to VEE may or may not be damaged, it really depends on what path is damaged inside the IC.

    What is the background of your question? I assume you've suffered a failure and trying to figure out why? We can help with that!